Several Brand New Balancers off the shelf have been chucked up and had some wobble.
harmonic balancer
Thread Starter
Pro
Joined: Feb 2011
Posts: 605
Likes: 1
From: Helotes TX
harmonic balancer
The dealer replaced my harmonic balancer about a month ago (18k on engine). I was looking at my engine today and it seems the balancer is wobling again. Any ideas why this problem would happen again?
Burning Brakes
Joined: Mar 2007
Posts: 763
Likes: 0
If it was damaged from the first pulley. My 05 coupe had the crank pulley fly off and it destroyed the crank snout (where the pulley sits against the crank). That was a bummer but my dealer took care of me pretty well. I have a thread about it somewhere of you feel like searching. I believe the title was "crank pulley flew off tonight wtf"
Racer
Joined: Mar 2007
Posts: 400
Likes: 1
took my car yesterday to the dealer for same issue at 40K miles, before going to dealer a performance shop mechanic told me a little wobble is normal, but mine was really bad, he told me I was lucky the belt was on. Still waiting to get my car back.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Instructor
Joined: Feb 2005
Posts: 111
Likes: 0
From: Whittier California
balancer repair - Help!
I've got "wobbly balancer syndrome" and the dealer is unaware of the pinning procedure. Does anyone have the GM repair info so that I can provide it to them?
They say, (per my VIN), that I'm out of warranty/recall range so I have to pay the $1,000 repair bill.
2006 C6, 54,000 miles, automatic
They say, (per my VIN), that I'm out of warranty/recall range so I have to pay the $1,000 repair bill.
2006 C6, 54,000 miles, automatic
Go Canes!
Joined: Dec 2009
Posts: 5,975
Likes: 329
From: Boca Raton FL
St. Jude Donor '11-'12-'13-'14-'15-'16-'17-'18-'19-'20-'21
A little wobble is normal. If you indeed have a bad harmonic balancer, go to a reputable corvette/speed shop in your area and have them do an under drive pulley. for the same price, you might as well get the extra 5-10HP for it. (Just my opinion, as that is what I did).
Now, as for $1000 from the dealer, that is much too expensive. A shop that knows what they are doing should be a few hundred cheaper than that!!
There are a few threads on this topic that helped me.
Now, as for $1000 from the dealer, that is much too expensive. A shop that knows what they are doing should be a few hundred cheaper than that!!
There are a few threads on this topic that helped me.
Instructor
Joined: Feb 2005
Posts: 111
Likes: 0
From: Whittier California
I noticed some wobble of the balancer and was able to tighten up the bolt a little with a 24mm end wrench to get to the dealer/stealer. The pulley was about to fly off.
This is actually the second dealer I went to. The first one did not even open the hood for 7 days and was clearly incompetent. The second dealer now has my car.
I will gladly accept donations to my Vette repair fund since I was dumb enough to trust the reliability of GM products and did not get the extended warranty.
If I drove my car harder, this would have happened years ago...and maybe catastrophically.
This is actually the second dealer I went to. The first one did not even open the hood for 7 days and was clearly incompetent. The second dealer now has my car.
I will gladly accept donations to my Vette repair fund since I was dumb enough to trust the reliability of GM products and did not get the extended warranty.
If I drove my car harder, this would have happened years ago...and maybe catastrophically.
Go Canes!
Joined: Dec 2009
Posts: 5,975
Likes: 329
From: Boca Raton FL
St. Jude Donor '11-'12-'13-'14-'15-'16-'17-'18-'19-'20-'21
I noticed some wobble of the balancer and was able to tighten up the bolt a little with a 24mm end wrench to get to the dealer/stealer. The pulley was about to fly off.
This is actually the second dealer I went to. The first one did not even open the hood for 7 days and was clearly incompetent. The second dealer now has my car.
I will gladly accept donations to my Vette repair fund since I was dumb enough to trust the reliability of GM products and did not get the extended warranty.
If I drove my car harder, this would have happened years ago...and maybe catastrophically.
This is actually the second dealer I went to. The first one did not even open the hood for 7 days and was clearly incompetent. The second dealer now has my car.
I will gladly accept donations to my Vette repair fund since I was dumb enough to trust the reliability of GM products and did not get the extended warranty.
If I drove my car harder, this would have happened years ago...and maybe catastrophically.
This car is meant to drive hard. Many people on this forum race thier cars often. The harmonic balancer is just one of those things, but not too serious.I would go get the car and go to a reputable Corvette shop. There may even be a sponsor of this forum in your area.
Good Luck!
